[DCCP]: dccp_v(4|6)_ctl_socket is leaked.

This seems a purism as module can't be unloaded, but though if cleanup
method is present it should be correct and clean all staff created.

Signed-off-by: Denis V. Lunev <[e-mail]>
Acked-by: Arnaldo Carvalho de Melo <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/dccp/ipv4.c

···
 
 static void __exit dccp_v4_exit(void)
 {
+	sock_release(dccp_v4_ctl_sk->sk_socket);
 	inet_unregister_protosw(&dccp_v4_protosw);
 	inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
 	proto_unregister(&dccp_v4_prot);

net/dccp/ipv6.c

···
 
 static void __exit dccp_v6_exit(void)
 {
+	sock_release(dccp_v6_ctl_sk->sk_socket);
 	inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
 	inet6_unregister_protosw(&dccp_v6_protosw);
 	proto_unregister(&dccp_v6_prot);